4. Installing the Open edX Developer Stack ¶

This chapter is intended for those who are installing and running the Open edX Developer Stack.

Chapter Contents:

Installing the Open edX Developer Stack

4.1. Overview ¶

The Open edX Developer Stack, known as Devstack, is a Vagrant instance designed for local development.

Devstack Uses the same system requirements as Open edX Fullstack. This allows you to discover and fix system configuration issues early in development.

Devstack Simplifies certain production settings to make development more convenient. For example, nginx and gunicorn are disabled in Devstack; Devstack uses Django’s runserver instead.

See the Vagrant documentation for more information.

4.2. Components ¶

Devstack includes the following edX components:

The Learning Management System (LMS)
edX Studio
Discussion Forums
Open Response Assessments (ORA)

Devstack also includes a demo edX course.

4.3. Knowledge Prerequisites ¶

To use Devstack, you should meeting the following knowledge requirements.

Understand basic terminal usage. If you are using a Mac computer, see Introduction to the Mac OS X Command Line. If you are using a Windows computer, see Windows Command Line Reference.
Understand Vagrant commands. See the Vagrant Getting Started guide for more information.

4.4. Software Prerequisites ¶

To install and run Devstack, you must first install the following required software.

VirtualBox 4.3.12 or higher
Vagrant 1.6.5 or higher
A Network File System (NFS) client, if your operating system does not include one. Devstack uses VirtualBox Guest Editions to share folders through NFS.

4.5. Install DevStack ¶

To install Devstack directly from the command line, follow the instructions below. You can also install DevStack using a Torrent file, as explained in the next section.

Before beginning the installation, ensure that you have the administrator password for your local computer. The administrator password is needed so that NFS can be set up to allow users to access code directories directly from your computer.

Ensure the nfsd client is running.
Create the devstack directory and navigate to it in the command prompt.
```
mkdir devstack
cd devstack
```

Download the Devstack Vagrant file.

curl -L https://raw.github.com/edx/configuration/master/vagrant/release/devstack/Vagrantfile > Vagrantfile

Install the Vagrant vbguest plugin.
```
vagrant plugin install vagrant-vbguest
```
Create the Devstack virtual machine.
```
vagrant up
```
The first time you create the Devstack virtual machine, Vagrant downloads the base box, which has a file size of about 4GB. If you destroy and recreate the virtual machine, Vagrant re-uses the box it downloaded. See Vagrant’s documentation on boxes for more information.
When prompted, enter the administrator password for your local computer.

When you have completed these steps, see Running the Open edX Developer Stack to begin using Devstack.

For help with the Devstack installation, see Troubleshooting the Devstack Installation.

4.6. Install Devstack using the Torrent file ¶

Download the Devstack Torrent file.
When you have the file on your computer, add the virtual machine using the following command.
vagrant box add box-name path-to-box-file

4.7. Troubleshooting the Devstack Installation ¶

In some cases, you see an error when you attempt to create the Devstack virtual machine (vagrant up). For example:

mount.nfs: mount to NFS server '192.168.33.1:/path/to/edx-platform' failed: timed out, giving up

This error situation arises because Vagrant uses a host-only network in Virtualbox to communicate with your computer. If a network does not exist, one is created on vagrant up. If this network is created with the VPN up, it will not work. You must recreate the network with the VPN down.

To resolve the error, follow these steps.

Stop the VPN.
Type vagrant halt.
Open Virtualbox.
Navigate to Preferences > Network > Host-only Networks and remove the most-recently-created host-only network.
Type vagrant up.